minor changes for lex spec

README.md

@@ -6,6 +6,8 @@
 * RBRACK `]`
 * LCURLY `{`
 * RCURLY `}`
+* LPAREN `(`
+* RPAREN `)`
 * ID `[all]`
 * SEMI `;`
 * COMMA `,`
@@ -16,4 +18,13 @@
 * RETURN `return`
 * IF `if`
 * ELSE `else`
-* STRING `"{any}"`
+* STRING `"{any}"`
+
+## Syntax Spec
+
+```
+decl := val typespec id stmt ;
+typespec := id | [id* -> id?]
+stmt := 
+
+```